GitLab CE/EE Auth Bypass for CSV Export of Confidential Issues (v18.2-18.10)
CVE-2026-2104 Published on April 8, 2026
Authorization Bypass Through User-Controlled Key in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to access confidential issues assigned to other users via CSV export due to insufficient authorization checks.
Vulnerability Analysis
CVE-2026-2104 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-2104 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-2104
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Affected Versions
GitLab:- Version 18.2 and below 18.8.9 is affected.
- Version 18.9 and below 18.9.5 is affected.
- Version 18.10 and below 18.10.3 is affected.